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Implement a sysctl to dump in-flight I/O state for debugging. The tool to

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parse it will be committed in a separate action.

Sponsored by:	Netflix
This commit is contained in:
Scott Long 2018-03-12 05:02:22 +00:00
parent 054564747d
commit cf6ea6f27a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=330789
2 changed files with 140 additions and 0 deletions
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70
sys/dev/mpr/mpr.c
View File

@ -56,6 +56,7 @@ __FBSDID("$FreeBSD$");
#include <sys/endian.h>
#include <sys/eventhandler.h>
#include <sys/sbuf.h>
#include <sys/priv.h>
#include <machine/bus.h>
#include <machine/resource.h>
@ -107,6 +108,7 @@ static void mpr_enqueue_request(struct mpr_softc *sc, struct mpr_command *cm);
static int mpr_get_iocfacts(struct mpr_softc *sc, MPI2_IOC_FACTS_REPLY *facts);
static int mpr_wait_db_ack(struct mpr_softc *sc, int timeout, int sleep_flag);
static int mpr_debug_sysctl(SYSCTL_HANDLER_ARGS);
static int mpr_dump_reqs(SYSCTL_HANDLER_ARGS);
static void mpr_parse_debug(struct mpr_softc *sc, char *list);
SYSCTL_NODE(_hw, OID_AUTO, mpr, CTLFLAG_RD, 0, "MPR Driver Parameters");
@ -1910,6 +1912,10 @@ mpr_setup_sysctl(struct mpr_softc *sc)
&sc->spinup_wait_time, DEFAULT_SPINUP_WAIT, "seconds to wait for "
"spinup after SATA ID error");
SYSCTL_ADD_PROC(sysctl_ctx, SYSCTL_CHILDREN(sysctl_tree),
OID_AUTO, "dump_reqs", CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_SKIP, sc, 0,
mpr_dump_reqs, "I", "Dump Active Requests");
SYSCTL_ADD_INT(sysctl_ctx, SYSCTL_CHILDREN(sysctl_tree),
OID_AUTO, "use_phy_num", CTLFLAG_RD, &sc->use_phynum, 0,
"Use the phy number for enumeration");
@ -2053,6 +2059,70 @@ mpr_parse_debug(struct mpr_softc *sc, char *list)
return;
}
struct mpr_dumpreq_hdr {
uint32_t smid;
uint32_t state;
uint32_t numframes;
uint32_t deschi;
uint32_t desclo;
};
static int
mpr_dump_reqs(SYSCTL_HANDLER_ARGS)
{
struct mpr_softc *sc;
struct mpr_chain *chain, *chain1;
struct mpr_command *cm;
struct mpr_dumpreq_hdr hdr;
struct sbuf *sb;
uint32_t smid, state;
int i, numreqs, error = 0;
sc = (struct mpr_softc *)arg1;
if ((error = priv_check(curthread, PRIV_DRIVER)) != 0) {
printf("priv check error %d\n", error);
return (error);
}
state = MPR_CM_STATE_INQUEUE;
smid = 1;
numreqs = sc->num_reqs;
if (req->newptr != NULL)
return (EINVAL);
if (smid == 0 || smid > sc->num_reqs)
return (EINVAL);
if (numreqs <= 0 || (numreqs + smid > sc->num_reqs))
numreqs = sc->num_reqs;
sb = sbuf_new_for_sysctl(NULL, NULL, 4096, req);
/* Best effort, no locking */
for (i = smid; i < numreqs; i++) {
cm = &sc->commands[i];
if (cm->cm_state != state)
continue;
hdr.smid = i;
hdr.state = cm->cm_state;
hdr.numframes = 1;
hdr.deschi = cm->cm_desc.Words.High;
hdr.desclo = cm->cm_desc.Words.Low;
TAILQ_FOREACH_SAFE(chain, &cm->cm_chain_list, chain_link,
chain1)
hdr.numframes++;
sbuf_bcat(sb, &hdr, sizeof(hdr));
sbuf_bcat(sb, cm->cm_req, 128);
TAILQ_FOREACH_SAFE(chain, &cm->cm_chain_list, chain_link,
chain1)
sbuf_bcat(sb, chain->chain, 128);
}
error = sbuf_finish(sb);
sbuf_delete(sb);
return (error);
}
int
mpr_attach(struct mpr_softc *sc)
{

70
sys/dev/mps/mps.c
View File

@ -59,6 +59,7 @@ __FBSDID("$FreeBSD$");
#include <sys/endian.h>
#include <sys/eventhandler.h>
#include <sys/sbuf.h>
#include <sys/priv.h>
#include <machine/bus.h>
#include <machine/resource.h>
@ -106,6 +107,7 @@ static void mps_enqueue_request(struct mps_softc *sc, struct mps_command *cm);
static int mps_get_iocfacts(struct mps_softc *sc, MPI2_IOC_FACTS_REPLY *facts);
static int mps_wait_db_ack(struct mps_softc *sc, int timeout, int sleep_flag);
static int mps_debug_sysctl(SYSCTL_HANDLER_ARGS);
static int mps_dump_reqs(SYSCTL_HANDLER_ARGS);
static void mps_parse_debug(struct mps_softc *sc, char *list);
SYSCTL_NODE(_hw, OID_AUTO, mps, CTLFLAG_RD, 0, "MPS Driver Parameters");
@ -1793,6 +1795,10 @@ mps_setup_sysctl(struct mps_softc *sc)
OID_AUTO, "encl_table_dump", CTLTYPE_STRING | CTLFLAG_RD, sc, 0,
mps_mapping_encl_dump, "A", "Enclosure Table Dump");
SYSCTL_ADD_PROC(sysctl_ctx, SYSCTL_CHILDREN(sysctl_tree),
OID_AUTO, "dump_reqs", CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_SKIP, sc, 0,
mps_dump_reqs, "I", "Dump Active Requests");
SYSCTL_ADD_INT(sysctl_ctx, SYSCTL_CHILDREN(sysctl_tree),
OID_AUTO, "use_phy_num", CTLFLAG_RD, &sc->use_phynum, 0,
"Use the phy number for enumeration");
@ -1925,6 +1931,70 @@ mps_parse_debug(struct mps_softc *sc, char *list)
return;
}
struct mps_dumpreq_hdr {
uint32_t smid;
uint32_t state;
uint32_t numframes;
uint32_t deschi;
uint32_t desclo;
};
static int
mps_dump_reqs(SYSCTL_HANDLER_ARGS)
{
struct mps_softc *sc;
struct mps_chain *chain, *chain1;
struct mps_command *cm;
struct mps_dumpreq_hdr hdr;
struct sbuf *sb;
uint32_t smid, state;
int i, numreqs, error = 0;
sc = (struct mps_softc *)arg1;
if ((error = priv_check(curthread, PRIV_DRIVER)) != 0) {
printf("priv check error %d\n", error);
return (error);
}
state = MPS_CM_STATE_INQUEUE;
smid = 1;
numreqs = sc->num_reqs;
if (req->newptr != NULL)
return (EINVAL);
if (smid == 0 || smid > sc->num_reqs)
return (EINVAL);
if (numreqs <= 0 || (numreqs + smid > sc->num_reqs))
numreqs = sc->num_reqs;
sb = sbuf_new_for_sysctl(NULL, NULL, 4096, req);
/* Best effort, no locking */
for (i = smid; i < numreqs; i++) {
cm = &sc->commands[i];
if (cm->cm_state != state)
continue;
hdr.smid = i;
hdr.state = cm->cm_state;
hdr.numframes = 1;
hdr.deschi = cm->cm_desc.Words.High;
hdr.desclo = cm->cm_desc.Words.Low;
TAILQ_FOREACH_SAFE(chain, &cm->cm_chain_list, chain_link,
chain1)
hdr.numframes++;
sbuf_bcat(sb, &hdr, sizeof(hdr));
sbuf_bcat(sb, cm->cm_req, 128);
TAILQ_FOREACH_SAFE(chain, &cm->cm_chain_list, chain_link,
chain1)
sbuf_bcat(sb, chain->chain, 128);
}
error = sbuf_finish(sb);
sbuf_delete(sb);
return (error);
}
int
mps_attach(struct mps_softc *sc)
{